We're dividing 879434 by 3 
The aim is to understand the frequency of 3 in 879434.

Step 1:
8 divided by 3 is 2 with a remainder of 2.
Use 2 as the next digit of our solution. 
Result so far: 2.0
The remainder is 2 after subtracting 6 from 8.
Bring next digit (7) of the dividend behind the 2 and repeat the process: 27 / 3

Moving on to step 2:
When dividing 27 by 3, we get 9 with a remainder of 0.
Write down 9 as next digit of the result. 
Result so far: 29.0
If we take 27 away from 27, we end up with 0.
Grab the next digit (9) from the dividend, add it to 0, then carry on: 9 / 3

Advancing to step 3:
9 divided by 3 is 3 with a remainder of 0.
The next digit of our result is 3. 
Result so far: 293.0
Subtracting 9 from 9 leaves us with 0.
Append the next digit (4) from the dividend to 0 and continue with: 4 / 3

Step 4:
3 goes into 4 1 times with a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 2931.0
Subtracting 3 from 4 leaves us with 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 3

Moving on to step 5:
When dividing 13 by 3, we get 4 with a remainder of 1.
The next digit of our result is 4. 
Result so far: 29314.0
If we take 12 away from 13, we end up with 1.
Bring next digit (4) of the dividend behind the 1 and repeat the process: 14 / 3

Advancing to step 6:
14 divided by 3 is 4 with a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 293144.0
If we take 12 away from 14, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 7:
3 can be fit into 20 6 times, resulting in a remainder of 2.
Use 6 as the next digit of our solution. 
Result so far: 293144.6
If we take 18 away from 20, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 8:
The number 3 fits into 20 6 times, leaving a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 293144.66
Deduct 18 from 20 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The final outcome is 293144.66, with a leftover of 0.002.